All-in-One Jewellery Industry Tools
Design, Production, Pricing & Sales
CAD Production Calculator
Estimate jewellery production weight from CAD weight, wax weight, or volume with metal-specific conversion.
Estimated Result
Ring Size Guide
Select your country and size, or enter diameter / circumference manually to see live conversion across all major size systems.
The ring preview updates live when you select a size or enter a manual diameter / circumference value.
Use a strip of paper or thread and mark the overlap point.
Measure that length in mm for circumference.
Or measure the inside width of a ring for diameter.
You can type values with decimals, such as 17.25 or 54.80. The nearest standard size will update automatically.
Conversion Result
Full Comparison Table
All major sizes are listed below for quick comparison.
| US / Canada | UK / Australia | India | Europe | Japan | Diameter (mm) | Circumference (mm) |
|---|
How to Measure Ring Size Correctly
Fingers are usually closest to their natural size later in the day, which gives a more reliable result.
Cold fingers can measure smaller and warm fingers can measure larger than normal.
Wrap it around the base of the finger, mark the overlap point, then measure the length in millimetres.
Measure the inside diameter of a ring that fits properly. This is often the easiest and most accurate option.
Professional Fit Tips
| Dimension | Carat |
|---|
| Dimension | Carat |
|---|
Metal Weight Converter
Convert jewellery weight across gold karats, silver, platinum and other metals instantly.
All-in-One Jewellery Industry Tools
Design, Production, Pricing & Sales
CAD Production Calculator
Estimate jewellery production weight from CAD weight, wax weight, or volume with metal-specific conversion.
Estimated Result
Ring Size Guide
Select your country and size, or enter diameter / circumference manually to see live conversion across all major size systems.
The ring preview updates live when you select a size or enter a manual diameter / circumference value.
Use a strip of paper or thread and mark the overlap point.
Measure that length in mm for circumference.
Or measure the inside width of a ring for diameter.
You can type values with decimals, such as 17.25 or 54.80. The nearest standard size will update automatically.
Conversion Result
Full Comparison Table
All major sizes are listed below for quick comparison.
| US / Canada | UK / Australia | India | Europe | Japan | Diameter (mm) | Circumference (mm) |
|---|
How to Measure Ring Size Correctly
Fingers are usually closest to their natural size later in the day, which gives a more reliable result.
Cold fingers can measure smaller and warm fingers can measure larger than normal.
Wrap it around the base of the finger, mark the overlap point, then measure the length in millimetres.
Measure the inside diameter of a ring that fits properly. This is often the easiest and most accurate option.
Professional Fit Tips
| Dimension | Carat |
|---|
| Dimension | Carat |
|---|
Metal Weight Converter
Convert jewellery weight across gold karats, silver, platinum and other metals instantly.
All-in-One Jewellery Industry Tools for Design, Production, Pricing & Sales
Design • Calculate • Manufacture • Price • Sell — All in One Place
From ring size conversion to gold weight estimation, diamond charts, manufacturing troubleshooting and market guidance — everything in one place.
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